[dygraphs.git] / tests / drawing.html

<!DOCTYPE html>
<html>
  <head>
    <title>Dygraphs Drawing Demo</title>
    <!--
    For production (minified) code, use:
    <script type="text/javascript" src="dygraph-combined.js"></script>
    -->
    <script type="text/javascript" src="../dygraph-dev.js"></script>

    <script>
    var start_date = new Date("2002/12/29").getTime();
    var end_date = new Date().getTime();
    data = [];
    for (var d = start_date; d < end_date; d += 604800 * 1000) {
      var millis = d + 2 * 3600 * 1000;
      var date = new Date(millis);
      var yyyy = date.getFullYear(),
          mm = date.getMonth(),
          dd = date.getDate();
      data.push( [ new Date(Date.UTC(yyyy, mm, dd)), 50 ]);
    }
    </script>

    <style>
    #tool_zoom {
      background: url('drawing/tool-palette.png');
      background-position: 0px 0px;
      width: 32px;
      height: 33px;
      margin-left: 50px;
      display: inline-block;
    }
    #tool_pencil {
      background: url('drawing/tool-palette.png');
      background-position: -32px 0px;
      width: 32px;
      height: 33px;
      display: inline-block;
    }
    #tool_eraser {
      background: url('drawing/tool-palette.png');
      background-position: -64px 0px;
      width: 33px;
      height: 33px;
      display: inline-block;
    }
    #toolbar {
      display: inline-block;
    }
    </style>
</head>
<body>
  <h2>Time Series Drawing Demo</h2>
  <div id='toolbar'>
    <div id="tool_zoom" onClick='change_tool(this)'></div><div id="tool_pencil" onClick='change_tool(this)'></div><div id="tool_eraser" onClick='change_tool(this)'></div>
  </div>
  <div id="draw_div" style="width: 800px; height: 400px;"></div>

  <script type="text/javascript">
    var isDrawing = false;
    var lastDrawRow = null, lastDrawValue = null;
    var tool = 'pencil';
    var valueRange = [0, 100];

    function setPoint(event, g, context) {
      var pos = Dygraph.findPos(g.graphDiv);
      var canvasx = Dygraph.pageX(event) - pos.x;
      var canvasy = Dygraph.pageY(event) - pos.y;
      var xy = g.toDataCoords(canvasx, canvasy);
      var x = xy[0], value = xy[1];
      var rows = g.numRows();
      var closest_row = -1;
      var smallest_diff = -1;
      // TODO(danvk): binary search
      for (var row = 0; row < rows; row++) {
        var date = g.getValue(row, 0);  // millis
        var diff = Math.abs(date - x);
        if (smallest_diff < 0 || diff < smallest_diff) {
          smallest_diff = diff;
          closest_row = row;
        }
      }

      if (closest_row != -1) {
        if (lastDrawRow === null) {
          lastDrawRow = closest_row;
          lastDrawValue = value;
        }
        var coeff = (value - lastDrawValue) / (closest_row - lastDrawRow);
        if (closest_row == lastDrawRow) coeff = 0.0;
        var minRow = Math.min(lastDrawRow, closest_row);
        var maxRow = Math.max(lastDrawRow, closest_row);
        for (var row = minRow; row <= maxRow; row++) {
          if (tool == 'pencil') {
            var val = lastDrawValue + coeff * (row - lastDrawRow);
            val = Math.max(valueRange[0], Math.min(val, valueRange[1]));
            data[row][1] = val;
            if (val == null || isNaN(val)) console.log(val);
          } else if (tool == 'eraser') {
            data[row][1] = null;
          }
        }
        lastDrawRow = closest_row;
        lastDrawValue = value;
        g.updateOptions({ file: data });
        g.setSelection(closest_row);  // prevents the dot from being finnicky.
      }
    }

    function finishDraw() {
      isDrawing = false;
      lastDrawRow = null;
      lastDrawValue = null;
    }

    function change_tool(tool_div) {
      var ids = ['tool_zoom', 'tool_pencil', 'tool_eraser'];
      for (var i = 0; i < ids.length; i++) {
        var div = document.getElementById(ids[i]);
        if (div == tool_div) {
          div.style.backgroundPosition = -(i * 32) + 'px -32px';
        } else {
          div.style.backgroundPosition = -(i * 32) + 'px 0px';
        }
      }
      tool = tool_div.id.replace('tool_', '');

      var dg_div = document.getElementById("draw_div");
      if (tool == 'pencil') {
        dg_div.style.cursor = 'url(drawing/cursor-pencil.png) 2 30, auto';
      } else if (tool == 'eraser') {
        dg_div.style.cursor = 'url(drawing/cursor-eraser.png) 10 30, auto';
      } else if (tool == 'zoom') {
        dg_div.style.cursor = 'crosshair';
      }
    }
    change_tool(document.getElementById("tool_pencil"));

    g = new Dygraph(document.getElementById("draw_div"), data,
        {
          valueRange: valueRange,
          labels: [ 'Date', 'Value' ],
          labelsUTC: true,
          interactionModel: {
            mousedown: function (event, g, context) {
              if (tool == 'zoom') {
                Dygraph.defaultInteractionModel.mousedown(event, g, context);
              } else {
                // prevents mouse drags from selecting page text.
                if (event.preventDefault) {
                  event.preventDefault();  // Firefox, Chrome, etc.
                } else {
                  event.returnValue = false;  // IE
                  event.cancelBubble = true;
                }
                isDrawing = true;
                setPoint(event, g, context);
              }
            },
            mousemove: function (event, g, context) {
              if (tool == 'zoom') {
              } else {
                if (!isDrawing) return;
                setPoint(event, g, context);
              }
            },
            mouseup: function(event, g, context) {
              if (tool == 'zoom') {
              } else {
                finishDraw();
              }
            },
            mouseout: function(event, g, context) {
              if (tool == 'zoom') {
              }
            },
            dblclick: function(event, g, context) {
              Dygraph.defaultInteractionModel.dblclick(event, g, context);
            },
            mousewheel: function(event, g, context) {
              var normal = event.detail ? event.detail * -1 : event.wheelDelta / 40;
              var percentage = normal / 50;
              var axis = g.xAxisRange();
              var xOffset = g.toDomCoords(axis[0], null)[0];
              var x = event.offsetX - xOffset;
              var w = g.toDomCoords(axis[1], null)[0] - xOffset;
              var xPct = w == 0 ? 0 : (x / w);

              var delta = axis[1] - axis[0];
              var increment = delta * percentage;
              var foo = [increment * xPct, increment * (1 - xPct)];
              var dateWindow = [ axis[0] + foo[0], axis[1] - foo[1] ];

              g.updateOptions({
                dateWindow: dateWindow
              });
              Dygraph.cancelEvent(event);
            }
          },
          strokeWidth: 1.5,
          gridLineColor: 'rgb(196, 196, 196)',
          axes: {
            y: {
              drawAxis: false,
              drawGrid: false
            }
          }
        });
        window.onmouseup = finishDraw;
  </script>

  <p style='font-size: 10pt'>Toolbar/cursor icons are CC-licensed from <a
  href="http://www.fatcow.com/free-icons">FatCow</a>.</p>
</body>
</html>
Commit	Line	Data
8c5fe59e DV	1	<!DOCTYPE html>
	2	<html>
	3	<head>
8c5fe59e	4	<title>Dygraphs Drawing Demo</title>
7e5ddc94 DV	5	<!--
	6	For production (minified) code, use:
	7	<script type="text/javascript" src="dygraph-combined.js"></script>
	8	-->
	9	<script type="text/javascript" src="../dygraph-dev.js"></script>
	10
fc7d0ef1	11	<script>
8c5fe59e DV	12	var start_date = new Date("2002/12/29").getTime();
	13	var end_date = new Date().getTime();
	14	data = [];
	15	for (var d = start_date; d < end_date; d += 604800 * 1000) {
	16	var millis = d + 2 * 3600 * 1000;
fc7d0ef1 DV	17	var date = new Date(millis);
	18	var yyyy = date.getFullYear(),
	19	mm = date.getMonth(),
	20	dd = date.getDate();
	21	data.push( [ new Date(Date.UTC(yyyy, mm, dd)), 50 ]);
8c5fe59e DV	22	}
8c5fe59e DV	23	</script>
fc7d0ef1 DV	24
fc7d0ef1 DV	25	<style>
8c5fe59e DV	26	#tool_zoom {
8c5fe59e DV	27	background: url('drawing/tool-palette.png');
86cf5a64	28	background-position: 0px 0px;
8c5fe59e DV	29	width: 32px;
	30	height: 33px;
	31	margin-left: 50px;
	32	display: inline-block;
	33	}
	34	#tool_pencil {
	35	background: url('drawing/tool-palette.png');
86cf5a64	36	background-position: -32px 0px;
8c5fe59e DV	37	width: 32px;
	38	height: 33px;
	39	display: inline-block;
	40	}
	41	#tool_eraser {
	42	background: url('drawing/tool-palette.png');
86cf5a64	43	background-position: -64px 0px;
8c5fe59e DV	44	width: 33px;
	45	height: 33px;
	46	display: inline-block;
	47	}
	48	#toolbar {
	49	display: inline-block;
	50	}
	51	</style>
	52	</head>
	53	<body>
	54	<h2>Time Series Drawing Demo</h2>
	55	<div id='toolbar'>
	56	<div id="tool_zoom" onClick='change_tool(this)'></div><div id="tool_pencil" onClick='change_tool(this)'></div><div id="tool_eraser" onClick='change_tool(this)'></div>
	57	</div>
	58	<div id="draw_div" style="width: 800px; height: 400px;"></div>
	59
	60	<script type="text/javascript">
	61	var isDrawing = false;
	62	var lastDrawRow = null, lastDrawValue = null;
	63	var tool = 'pencil';
	64	var valueRange = [0, 100];
	65
	66	function setPoint(event, g, context) {
fc7d0ef1 DV	67	var pos = Dygraph.findPos(g.graphDiv);
	68	var canvasx = Dygraph.pageX(event) - pos.x;
	69	var canvasy = Dygraph.pageY(event) - pos.y;
8c5fe59e DV	70	var xy = g.toDataCoords(canvasx, canvasy);
	71	var x = xy[0], value = xy[1];
	72	var rows = g.numRows();
	73	var closest_row = -1;
	74	var smallest_diff = -1;
	75	// TODO(danvk): binary search
	76	for (var row = 0; row < rows; row++) {
	77	var date = g.getValue(row, 0); // millis
	78	var diff = Math.abs(date - x);
	79	if (smallest_diff < 0 \|\| diff < smallest_diff) {
	80	smallest_diff = diff;
	81	closest_row = row;
	82	}
	83	}
	84
	85	if (closest_row != -1) {
	86	if (lastDrawRow === null) {
	87	lastDrawRow = closest_row;
	88	lastDrawValue = value;
	89	}
	90	var coeff = (value - lastDrawValue) / (closest_row - lastDrawRow);
	91	if (closest_row == lastDrawRow) coeff = 0.0;
	92	var minRow = Math.min(lastDrawRow, closest_row);
	93	var maxRow = Math.max(lastDrawRow, closest_row);
	94	for (var row = minRow; row <= maxRow; row++) {
	95	if (tool == 'pencil') {
	96	var val = lastDrawValue + coeff * (row - lastDrawRow);
	97	val = Math.max(valueRange[0], Math.min(val, valueRange[1]));
	98	data[row][1] = val;
	99	if (val == null \|\| isNaN(val)) console.log(val);
	100	} else if (tool == 'eraser') {
	101	data[row][1] = null;
	102	}
	103	}
	104	lastDrawRow = closest_row;
	105	lastDrawValue = value;
	106	g.updateOptions({ file: data });
	107	g.setSelection(closest_row); // prevents the dot from being finnicky.
	108	}
	109	}
	110
	111	function finishDraw() {
	112	isDrawing = false;
	113	lastDrawRow = null;
	114	lastDrawValue = null;
	115	}
	116
	117	function change_tool(tool_div) {
86cf5a64	118	var ids = ['tool_zoom', 'tool_pencil', 'tool_eraser'];
8c5fe59e	119	for (var i = 0; i < ids.length; i++) {
86cf5a64 DV	120	var div = document.getElementById(ids[i]);
	121	if (div == tool_div) {
	122	div.style.backgroundPosition = -(i * 32) + 'px -32px';
	123	} else {
	124	div.style.backgroundPosition = -(i * 32) + 'px 0px';
	125	}
8c5fe59e	126	}
8c5fe59e DV	127	tool = tool_div.id.replace('tool_', '');
	128
	129	var dg_div = document.getElementById("draw_div");
	130	if (tool == 'pencil') {
	131	dg_div.style.cursor = 'url(drawing/cursor-pencil.png) 2 30, auto';
	132	} else if (tool == 'eraser') {
	133	dg_div.style.cursor = 'url(drawing/cursor-eraser.png) 10 30, auto';
	134	} else if (tool == 'zoom') {
	135	dg_div.style.cursor = 'crosshair';
	136	}
	137	}
	138	change_tool(document.getElementById("tool_pencil"));
	139
	140	g = new Dygraph(document.getElementById("draw_div"), data,
	141	{
	142	valueRange: valueRange,
	143	labels: [ 'Date', 'Value' ],
fc7d0ef1	144	labelsUTC: true,
8c5fe59e DV	145	interactionModel: {
	146	mousedown: function (event, g, context) {
	147	if (tool == 'zoom') {
	148	Dygraph.defaultInteractionModel.mousedown(event, g, context);
	149	} else {
	150	// prevents mouse drags from selecting page text.
	151	if (event.preventDefault) {
	152	event.preventDefault(); // Firefox, Chrome, etc.
	153	} else {
	154	event.returnValue = false; // IE
	155	event.cancelBubble = true;
	156	}
	157	isDrawing = true;
	158	setPoint(event, g, context);
	159	}
	160	},
	161	mousemove: function (event, g, context) {
	162	if (tool == 'zoom') {
8c5fe59e DV	163	} else {
	164	if (!isDrawing) return;
	165	setPoint(event, g, context);
	166	}
	167	},
	168	mouseup: function(event, g, context) {
	169	if (tool == 'zoom') {
8c5fe59e DV	170	} else {
	171	finishDraw();
	172	}
	173	},
	174	mouseout: function(event, g, context) {
	175	if (tool == 'zoom') {
8c5fe59e DV	176	}
	177	},
	178	dblclick: function(event, g, context) {
	179	Dygraph.defaultInteractionModel.dblclick(event, g, context);
	180	},
	181	mousewheel: function(event, g, context) {
	182	var normal = event.detail ? event.detail * -1 : event.wheelDelta / 40;
	183	var percentage = normal / 50;
	184	var axis = g.xAxisRange();
	185	var xOffset = g.toDomCoords(axis[0], null)[0];
	186	var x = event.offsetX - xOffset;
	187	var w = g.toDomCoords(axis[1], null)[0] - xOffset;
	188	var xPct = w == 0 ? 0 : (x / w);
	189
	190	var delta = axis[1] - axis[0];
	191	var increment = delta * percentage;
	192	var foo = [increment * xPct, increment * (1 - xPct)];
	193	var dateWindow = [ axis[0] + foo[0], axis[1] - foo[1] ];
	194
	195	g.updateOptions({
	196	dateWindow: dateWindow
	197	});
	198	Dygraph.cancelEvent(event);
	199	}
	200	},
	201	strokeWidth: 1.5,
	202	gridLineColor: 'rgb(196, 196, 196)',
fc7d0ef1 DV	203	axes: {
	204	y: {
	205	drawAxis: false,
	206	drawGrid: false
	207	}
	208	}
8c5fe59e DV	209	});
	210	window.onmouseup = finishDraw;
	211	</script>
	212
	213	<p style='font-size: 10pt'>Toolbar/cursor icons are CC-licensed from <a
	214	href="http://www.fatcow.com/free-icons">FatCow</a>.</p>
	215	</body>
	216	</html>